1
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Deodhar S, Sillman B, Bade AN, Avedissian SN, Podany AT, McMillan JM, Gautam N, Hanson B, Dyavar Shetty BL, Szlachetka A, Johnston M, Thurman M, Munt DJ, Dash AK, Markovic M, Dahan A, Alnouti Y, Yazdi A, Kevadiya BD, Byrareddy SN, Cohen SM, Edagwa B, Gendelman HE. Transformation of dolutegravir into an ultra-long-acting parenteral prodrug formulation. Nat Commun 2022; 13:3226. [PMID: 35680875 PMCID: PMC9184486 DOI: 10.1038/s41467-022-30902-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 05/20/2022] [Indexed: 11/09/2022] Open
Abstract
Ultra-long-acting integrase strand transfer inhibitors were created by screening a library of monomeric and dimeric dolutegravir (DTG) prodrug nanoformulations. This led to an 18-carbon chain modified ester prodrug nanocrystal (coined NM2DTG) with the potential to sustain yearly dosing. Here, we show that the physiochemical and pharmacokinetic (PK) formulation properties facilitate slow drug release from tissue macrophage depot stores at the muscle injection site and adjacent lymphoid tissues following single parenteral injection. Significant plasma drug levels are recorded up to a year following injection. Tissue sites for prodrug hydrolysis are dependent on nanocrystal dissolution and prodrug release, drug-depot volume, perfusion, and cell-tissue pH. Each affect an extended NM2DTG apparent half-life recorded by PK parameters. The NM2DTG product can impact therapeutic adherence, tolerability, and access of a widely used integrase inhibitor in both resource limited and rich settings to reduce HIV-1 transmission and achieve optimal treatment outcomes.
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Affiliation(s)
- Suyash Deodhar
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Brady Sillman
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198, USA.,Nebraska Nanomedicine Production Plant, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Aditya N Bade
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Sean N Avedissian
- Department of Pharmacy Practice and Science, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Anthony T Podany
- Department of Pharmacy Practice and Science, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - JoEllyn M McMillan
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Nagsen Gautam
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Brandon Hanson
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Bhagya L Dyavar Shetty
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Adam Szlachetka
- Nebraska Nanomedicine Production Plant, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Morgan Johnston
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Michellie Thurman
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Daniel J Munt
- Department of Pharmacy Sciences, Creighton University, Omaha, NE, 68178, USA
| | - Alekha K Dash
- Department of Pharmacy Sciences, Creighton University, Omaha, NE, 68178, USA
| | - Milica Markovic
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Arik Dahan
- Department of Clinical Pharmacology, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel
| | - Yazen Alnouti
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Alborz Yazdi
- Exavir Therapeutics, Inc., New York, NY, 10012, USA
| | - Bhavesh D Kevadiya
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Siddappa N Byrareddy
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Samuel M Cohen
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Benson Edagwa
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198, USA. .,Nebraska Nanomedicine Production Plant, University of Nebraska Medical Center, Omaha, NE, 68198, USA. .,Exavir Therapeutics, Inc., New York, NY, 10012, USA.
| | - Howard E Gendelman
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, 68198, USA. .,Nebraska Nanomedicine Production Plant, University of Nebraska Medical Center, Omaha, NE, 68198, USA. .,Department of Pharmaceutical Sciences, University of Nebraska Medical Center, Omaha, NE, 68198, USA. .,Exavir Therapeutics, Inc., New York, NY, 10012, USA.
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2
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Mori L, Valente ST. Cure and Long-Term Remission Strategies. METHODS IN MOLECULAR BIOLOGY (CLIFTON, N.J.) 2022; 2407:391-428. [PMID: 34985678 DOI: 10.1007/978-1-0716-1871-4_26] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The majority of virally suppressed individuals will experience rapid viral rebound upon antiretroviral therapy (ART) interruption, providing a strong rationale for the development of cure strategies. Moreover, despite ART virological control, HIV infection is still associated with chronic immune activation, inflammation, comorbidities, and accelerated aging. These effects are believed to be due, in part, to low-grade persistent transcription and trickling production of viral proteins from the pool of latent proviruses constituting the viral reservoir. In recent years there has been an increasing interest in developing what has been termed a functional cure for HIV. This approach entails the long-term, durable control of viral expression in the absence of therapy, preventing disease progression and transmission, despite the presence of detectable integrated proviruses. One such strategy, the block-and-lock approach for a functional cure, proposes the epigenetic silencing of proviral expression, locking the virus in a profound latent state, from which reactivation is very unlikely. The proof-of-concept for this approach was demonstrated with the use of a specific small molecule targeting HIV transcription. Here we review the principles behind the block-and-lock approach and some of the additional strategies proposed to silence HIV expression.
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Affiliation(s)
- Luisa Mori
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL, USA
| | - Susana T Valente
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL, USA.
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3
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Espinar-Buitrago M, Muñoz-Fernández MA. New Approaches to Dendritic Cell-Based Therapeutic Vaccines Against HIV-1 Infection. Front Immunol 2022; 12:719664. [PMID: 35058917 PMCID: PMC8763680 DOI: 10.3389/fimmu.2021.719664] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 12/07/2021] [Indexed: 11/13/2022] Open
Abstract
Due to the success of combined antiretroviral therapy (cART) in recent years, the pathological outcome of Human Immunodeficiency Virus type 1 (HIV-1) infection has improved substantially, achieving undetectable viral loads in most cases. Nevertheless, the presence of a viral reservoir formed by latently infected cells results in patients having to maintain treatment for life. In the absence of effective eradication strategies against HIV-1, research efforts are focused on obtaining a cure. One of these approaches is the creation of therapeutic vaccines. In this sense, the most promising one up to now is based on the establishing of the immunological synapse between dendritic cells (DCs) and T lymphocytes (TL). DCs are one of the first cells of the immune system to encounter HIV-1 by acting as antigen presenting cells, bringing about the interaction between innate and adaptive immune responses mediated by TL. Furthermore, TL are the end effector, and their response capacity is essential in the adaptive elimination of cells infected by pathogens. In this review, we summarize the knowledge of the interaction between DCs with TL, as well as the characterization of the specific T-cell response against HIV-1 infection. The use of nanotechnology in the design and improvement of vaccines based on DCs has been researched and presented here with a special emphasis.
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Affiliation(s)
- Marisierra Espinar-Buitrago
- Section Head Immunology, Laboratorio InmunoBiología Molecular, Hospital General Universitario Gregorio Marañón (HGUGM), Madrid, Spain.,Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Madrid, Spain
| | - Ma Angeles Muñoz-Fernández
- Section Head Immunology, Laboratorio InmunoBiología Molecular, Hospital General Universitario Gregorio Marañón (HGUGM), Madrid, Spain.,Instituto de Investigación Sanitaria Gregorio Marañón (IiSGM), Madrid, Spain.,Spanish Human Immunodeficiency Virus- Hospital Gregorio Marañón (HIV-HGM) BioBank, Madrid, Spain.,Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
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4
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Saeb S, Assche JV, Loustau T, Rohr O, Wallet C, Schwartz C. Suicide gene therapy in cancer and HIV-1 infection: An alternative to conventional treatments. Biochem Pharmacol 2021; 197:114893. [PMID: 34968484 DOI: 10.1016/j.bcp.2021.114893] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 12/15/2021] [Accepted: 12/16/2021] [Indexed: 12/16/2022]
Abstract
Suicide Gene Therapy (SGT) aims to introduce a gene encoding either a toxin or an enzyme making the targeted cell more sensitive to chemotherapy. SGT represents an alternative approach to combat pathologies where conventional treatments fail such as pancreatic cancer or the high-grade glioblastoma which are still desperately lethal. We review the possibility to use SGT to treat these cancers which have shown promising results in vitro and in preclinical trials. However, SGT has so far failed in phase III clinical trials thus further improvements are awaited. We can now take advantages of the many advances made in SGT for treating cancer to combat other pathologies such as HIV-1 infection. In the review we also discuss the feasibility to add SGT to the therapeutic arsenal used to cure HIV-1-infected patients. Indeed, preliminary results suggest that both productive and latently infected cells are targeted by the SGT. In the last section, we address the limitations of this approach and how we might improve it.
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Affiliation(s)
- Sepideh Saeb
- Department of Virology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran; University of Strasbourg, Research Unit 7292, DHPI, IUT Louis Pasteur, Schiltigheim, France
| | - Jeanne Van Assche
- University of Strasbourg, Research Unit 7292, DHPI, IUT Louis Pasteur, Schiltigheim, France
| | - Thomas Loustau
- University of Strasbourg, Research Unit 7292, DHPI, IUT Louis Pasteur, Schiltigheim, France
| | - Olivier Rohr
- University of Strasbourg, Research Unit 7292, DHPI, IUT Louis Pasteur, Schiltigheim, France
| | - Clémentine Wallet
- University of Strasbourg, Research Unit 7292, DHPI, IUT Louis Pasteur, Schiltigheim, France
| | - Christian Schwartz
- University of Strasbourg, Research Unit 7292, DHPI, IUT Louis Pasteur, Schiltigheim, France.
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5
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Dubé K, Kanazawa J, Dee L, Taylor J, Sauceda JA, Gianella S, Smith D, Deeks SG, Peluso MJ. Considerations for designing and implementing combination HIV cure trials: findings from a qualitative in-depth interview study in the United States. AIDS Res Ther 2021; 18:75. [PMID: 34663375 PMCID: PMC8522863 DOI: 10.1186/s12981-021-00401-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 10/06/2021] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND An increasing number of HIV cure trials involve combining multiple potentially curative interventions. Until now, considerations for designing and implementing complex combination HIV cure trials have not been thoroughly considered. METHODS We used a purposive method to select key informants for our study. Informants included biomedical HIV cure researchers, regulators, policy makers, bioethicists, and community members. We used in-depth interviews to generate ethical and practical considerations to guide the design and implementation of combination HIV cure research. We analyzed the qualitative data using conventional content analysis focused on inductive reasoning. RESULTS We interviewed 11 biomedical researchers, 4 community members, 2 regulators, 1 policy researcher, and 1 bioethicist. Informants generated considerations for designing and implementing combination interventions towards an HIV cure, focused on ethical aspects, as well as considerations to guide trial design, benefit/risk determinations, regulatory requirements, prioritization and sequencing and timing of interventions, among others. Informants also provided considerations related to combining specific HIV cure research modalities, such as broadly neutralizing antibodies (bNAbs), cell and gene modification products, latency-reversing agents and immune-based interventions. Finally, informants provided suggestions to ensure meaningful therapeutic improvements over standard antiretroviral therapy, overcome challenges of designing combination approaches, and engage communities around combination HIV cure research. CONCLUSION The increasing number of combination HIV cure trials brings with them a host of ethical and practical challenges. We hope our paper will inform meaningful stakeholder dialogue around the use of combinatorial HIV cure research approaches. To protect the public trust in HIV cure research, considerations should be periodically revisited and updated with key stakeholder input as the science continues to advance.
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Affiliation(s)
- Karine Dubé
- University of North Carolina Chapel Hill, Gillings School of Global Public Health, 4108 McGavran-Greenberg Hall, Chapel Hill, NC 27599 USA
- UNC Gillings School of Global Public Health, 4108 McGavran-Greenberg Hall, Chapel Hill, NC 27516 USA
| | - John Kanazawa
- University of North Carolina Chapel Hill, Gillings School of Global Public Health, 4108 McGavran-Greenberg Hall, Chapel Hill, NC 27599 USA
| | - Lynda Dee
- AIDS Action Baltimore, 14 East Eager Street, Baltimore, MD 21202 USA
- Delaney AIDS Research Enterprise (DARE) Community Advisory Board (CAB), 995 Potrero Avenue, San Francisco, CA 94110 USA
| | - Jeff Taylor
- Delaney AIDS Research Enterprise (DARE) Community Advisory Board (CAB), 995 Potrero Avenue, San Francisco, CA 94110 USA
- HIV+Aging Research Project-Palm Springs (H+ARP-PS), 1775 East Palm Canyon Drive, Suite 110-349, Palm Springs, CA 92264 USA
| | - John A. Sauceda
- Department of Medicine, Division of Prevention Science, Center for AIDS Prevention Studies (CAPS), University of California, San Francisco (UCSF), 550 16th Street, 3rd Floor, San Francisco, CA 94158 USA
| | - Sara Gianella
- Department of Medicine, Division of Infectious Diseases and Global Public Health, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093 USA
| | - Davey Smith
- Department of Medicine, Division of Infectious Diseases and Global Public Health, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093 USA
- AntiViral Research Center (AVRC), University of California at San Diego, 220 Dickinson Street, Suite A, San Diego, CA 92103 USA
| | - Steven G. Deeks
- Department of Medicine, Division of HIV, Infectious Diseases, and Global Medicine, San Francisco General Hospital, University of California, San Francisco (UCSF), Ward 84, Building 80, San Francisco, CA 94110 USA
| | - Michael J. Peluso
- Department of Medicine, Division of HIV, Infectious Diseases, and Global Medicine, San Francisco General Hospital, University of California, San Francisco (UCSF), Ward 84, Building 80, San Francisco, CA 94110 USA
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6
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Dubé K, Kanazawa J, Taylor J, Dee L, Jones N, Roebuck C, Sylla L, Louella M, Kosmyna J, Kelly D, Clanton O, Palm D, Campbell DM, Onaiwu MG, Patel H, Ndukwe S, Henley L, Johnson MO, Saberi P, Brown B, Sauceda JA, Sugarman J. Ethics of HIV cure research: an unfinished agenda. BMC Med Ethics 2021; 22:83. [PMID: 34193141 PMCID: PMC8243312 DOI: 10.1186/s12910-021-00651-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 06/23/2021] [Indexed: 02/07/2023] Open
Abstract
Background The pursuit of a cure for HIV is a high priority for researchers, funding agencies, governments and people living with HIV (PLWH). To date, over 250 biomedical studies worldwide are or have been related to discovering a safe, effective, and scalable HIV cure, most of which are early translational research and experimental medicine. As HIV cure research increases, it is critical to identify and address the ethical challenges posed by this research. Methods We conducted a scoping review of the growing HIV cure research ethics literature, focusing on articles published in English peer-reviewed journals from 2013 to 2021. We extracted and summarized key developments in the ethics of HIV cure research. Twelve community advocates actively engaged in HIV cure research provided input on this summary and suggested areas warranting further ethical inquiry and foresight via email exchange and video conferencing. Discussion Despite substantial scholarship related to the ethics of HIV cure research, additional attention should focus on emerging issues in six categories of ethical issues: (1) social value (ongoing and emerging biomedical research and scalability considerations); (2) scientific validity (study design issues, such as the use of analytical treatment interruptions and placebos); (3) fair selection of participants (equity and justice considerations); (4) favorable benefit/risk balance (early phase research, benefit-risk balance, risk perception, psychological risks, and pediatric research); (5) informed consent (attention to language, decision-making, informed consent processes and scientific uncertainty); and (6) respect for enrolled participants and community (perspectives of people living with HIV and affected communities and representation). Conclusion HIV cure research ethics has an unfinished agenda. Scientific research and bioethics should work in tandem to advance ethical HIV cure research. Because the science of HIV cure research will continue to rapidly advance, ethical considerations of the major themes we identified will need to be revisited and refined over time.
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Affiliation(s)
- Karine Dubé
- University of North Carolina at Chapel Hill, Gillings School of Global Public Health, 4108 McGavran-Greenberg Hall, Chapel Hill, NC, 27599-7469, USA.
| | - John Kanazawa
- University of North Carolina at Chapel Hill, Gillings School of Global Public Health, 4108 McGavran-Greenberg Hall, Chapel Hill, NC, 27599-7469, USA
| | - Jeff Taylor
- HIV + Aging Research Project - Palm Springs (HARP-PS), Palm Springs, CA, USA.,AntiViral Research Center (AVRC) Community Advisory Board (CAB), San Diego, CA, USA.,Collaboratory of AIDS Researchers for Eradication (CARE) CAB, Chapel Hill, NC, USA
| | - Lynda Dee
- AIDS Action Baltimore, Baltimore, MD, USA.,Delaney AIDS Research Enterprise (DARE) Community Advisory Board (CAB), San Francisco, CA, USA
| | - Nora Jones
- BEAT-HIV Collaboratory CAB, Philadelphia, PA, USA
| | | | | | | | - Jan Kosmyna
- AIDS Clinical Trials Group (ACTG) Community Scientific Subcommittee (CSS) Ethics Working Group, Nationwide, USA
| | - David Kelly
- AIDS Clinical Trials Group (ACTG) Community Scientific Subcommittee (CSS) Ethics Working Group, Nationwide, USA
| | - Orbit Clanton
- AIDS Clinical Trials Group Global CAB, Washington, D.C., USA
| | - David Palm
- Collaboratory of AIDS Researchers for Eradication (CARE) CAB, Chapel Hill, NC, USA.,Institute of Global Health and Infectious Diseases HIV Treatment and Prevention CAB, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Danielle M Campbell
- Delaney AIDS Research Enterprise (DARE) Community Advisory Board (CAB), San Francisco, CA, USA.,Charles R. Drew College of Medicine and Science, Los Angeles, CA, USA
| | - Morénike Giwa Onaiwu
- AIDS Clinical Trials Group (ACTG) Community Scientific Subcommittee (CSS) Ethics Working Group, Nationwide, USA.,Center for the Study of Women, Gender, and Sexuality (School of Humanities), Rice University, Houston, TX, USA
| | - Hursch Patel
- University of North Carolina at Chapel Hill, Gillings School of Global Public Health, 4108 McGavran-Greenberg Hall, Chapel Hill, NC, 27599-7469, USA
| | - Samuel Ndukwe
- University of North Carolina at Chapel Hill, Gillings School of Global Public Health, 4108 McGavran-Greenberg Hall, Chapel Hill, NC, 27599-7469, USA
| | - Laney Henley
- University of North Carolina at Chapel Hill, Gillings School of Global Public Health, 4108 McGavran-Greenberg Hall, Chapel Hill, NC, 27599-7469, USA
| | - Mallory O Johnson
- Center for AIDS Prevention Studies (CAPS), Division of Prevention Sciences, UCSF, San Francisco, CA, USA
| | - Parya Saberi
- Center for AIDS Prevention Studies (CAPS), Division of Prevention Sciences, UCSF, San Francisco, CA, USA
| | - Brandon Brown
- Department of Social Medicine, Population and Public Health, Center for Healthy Communities, University of California, Riverside, Riverside, CA, USA
| | - John A Sauceda
- Center for AIDS Prevention Studies (CAPS), Division of Prevention Sciences, UCSF, San Francisco, CA, USA
| | - Jeremy Sugarman
- Johns Hopkins Berman Institute for Bioethics, Baltimore, MD, USA
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7
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Gramatica A, Schwarzer R, Brantley W, Varco-Merth B, Sperber HS, Hull PA, Montano M, Migueles SA, Rosenthal D, Hogan LE, Johnson JR, Packard TA, Grimmett ZW, Herzig E, Besnard E, Nekorchuk M, Hsiao F, Deeks SG, Snape M, Kiernan B, Roan NR, Lifson JD, Estes JD, Picker LJ, Verdin E, Krogan NJ, Henrich TJ, Connors M, Ott M, Pillai SK, Okoye AA, Greene WC. Evaluating a New Class of AKT/mTOR Activators for HIV Latency Reversing Activity Ex Vivo and In Vivo. J Virol 2021; 95:JVI.02393-20. [PMID: 33536176 PMCID: PMC8103695 DOI: 10.1128/jvi.02393-20] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 01/21/2021] [Indexed: 12/11/2022] Open
Abstract
An ability to activate latent HIV-1 expression could benefit many HIV cure strategies, but the first generation of latency reversing agents (LRAs) has proven disappointing. We evaluated AKT/mTOR activators as a potential new class of LRAs. Two glycogen synthase kinase-3 inhibitors (GSK-3i's), SB-216763 and tideglusib (the latter already in phase II clinical trials) that activate AKT/mTOR signaling were tested. These GSK-3i's reactivated latent HIV-1 present in blood samples from aviremic individuals on antiretroviral therapy (ART) in the absence of T cell activation, release of inflammatory cytokines, cell toxicity, or impaired effector function of cytotoxic T lymphocytes or NK cells. However, when administered in vivo to SIV-infected rhesus macaques on suppressive ART, tideglusib exhibited poor pharmacodynamic properties and resulted in no clear evidence of significant SIV latency reversal. Whether alternative pharmacological formulations or combinations of this drug with other classes of LRAs will lead to an effective in vivo latency-reversing strategy remains to be determined.IMPORTANCE If combined with immune therapeutics, latency reversing agents (LRAs) have the potential to reduce the size of the reservoir sufficiently that an engineered immune response can control the virus in the absence of antiretroviral therapy. We have identified a new class of LRAs that do not induce T-cell activation and that are able to potentiate, rather than inhibit, CD8+ T and NK cell cytotoxic effector functions. This new class of LRAs corresponds to inhibitors of glycogen synthase kinase-3. In this work, we have also studied the effects of one member of this drug class, tideglusib, in SIV-infected rhesus monkeys. When tested in vivo, however, tideglusib showed unfavorable pharmacokinetic properties, which resulted in lack of SIV latency reversal. The disconnect between our ex vivo and in vivo results highlights the importance of developing next generation LRAs with pharmacological properties that allow systemic drug delivery in relevant anatomical compartments harboring latent reservoirs.
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Affiliation(s)
- Andrea Gramatica
- Gladstone Institute of Virology, Gladstone Institutes, San Francisco, California, USA
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA
| | - Roland Schwarzer
- Gladstone Institute of Virology, Gladstone Institutes, San Francisco, California, USA
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA
| | - William Brantley
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA
| | - Benjamin Varco-Merth
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA
| | - Hannah S Sperber
- Vitalant Research Institute, San Francisco, California, USA
- Free University of Berlin, Institute of Biochemistry, Berlin, Germany
| | - Philip A Hull
- Gladstone Institute of Virology, Gladstone Institutes, San Francisco, California, USA
| | - Mauricio Montano
- Gladstone Institute of Virology, Gladstone Institutes, San Francisco, California, USA
| | - Stephen A Migueles
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Danielle Rosenthal
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Louise E Hogan
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA
| | - Jeffrey R Johnson
- Gladstone Institute of Virology, Gladstone Institutes, San Francisco, California, USA
- Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, California, USA
| | - Thomas A Packard
- Gladstone Institute of Virology, Gladstone Institutes, San Francisco, California, USA
| | - Zachary W Grimmett
- Gladstone Institute of Virology, Gladstone Institutes, San Francisco, California, USA
| | - Eytan Herzig
- Gladstone Institute of Virology, Gladstone Institutes, San Francisco, California, USA
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA
| | - Emilie Besnard
- Gladstone Institute of Virology, Gladstone Institutes, San Francisco, California, USA
| | - Michael Nekorchuk
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA
| | - Feng Hsiao
- Gladstone Institute of Virology, Gladstone Institutes, San Francisco, California, USA
- Department of Urology, University of California, San Francisco, San Francisco, California, USA
| | - Steven G Deeks
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA
| | | | | | - Nadia R Roan
- Gladstone Institute of Virology, Gladstone Institutes, San Francisco, California, USA
- Department of Urology, University of California, San Francisco, San Francisco, California, USA
| | - Jeffrey D Lifson
- AIDS and Cancer Virus Program, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, Maryland, USA
| | - Jacob D Estes
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA
| | - Louis J Picker
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA
| | - Eric Verdin
- Gladstone Institute of Virology, Gladstone Institutes, San Francisco, California, USA
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, California, USA
| | - Nevan J Krogan
- Gladstone Institute of Virology, Gladstone Institutes, San Francisco, California, USA
- Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, California, USA
| | - Timothy J Henrich
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA
| | - Mark Connors
- National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Melanie Ott
- Gladstone Institute of Virology, Gladstone Institutes, San Francisco, California, USA
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, California, USA
| | - Satish K Pillai
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California, USA
- Vitalant Research Institute, San Francisco, California, USA
| | - Afam A Okoye
- Vaccine and Gene Therapy Institute and Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon, USA
| | - Warner C Greene
- Gladstone Institute of Virology, Gladstone Institutes, San Francisco, California, USA
- Department of Medicine, University of California, San Francisco, San Francisco, California, USA
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, California, USA
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8
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Sperber HS, Togarrati PP, Raymond KA, Bouzidi MS, Gilfanova R, Gutierrez AG, Muench MO, Pillai SK. μ-Lat: A mouse model to evaluate human immunodeficiency virus eradication strategies. FASEB J 2020; 34:14615-14630. [PMID: 32901981 PMCID: PMC8787083 DOI: 10.1096/fj.202001612rr] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/14/2020] [Accepted: 08/17/2020] [Indexed: 01/08/2023]
Abstract
A critical barrier to the development of a human immunodeficiency virus (HIV) cure is the lack of a scalable animal model that enables robust evaluation of eradication approaches prior to testing in humans. We established a humanized mouse model of latent HIV infection by transplanting "J-Lat" cells, Jurkat cells harboring a latent HIV provirus encoding an enhanced green fluorescent protein (GFP) reporter, into irradiated adult NOD.Cg-Prkdcscid Il2rgtm1Wjl /SzJ (NSG) mice. J-Lat cells exhibited successful engraftment in several tissues including spleen, bone barrow, peripheral blood, and lung, in line with the diverse natural tissue tropism of HIV. Administration of tumor necrosis factor (TNF)-α, an established HIV latency reversal agent, significantly induced GFP expression in engrafted cells across tissues, reflecting viral reactivation. These data suggest that our murine latency ("μ-Lat") model enables efficient determination of how effectively viral eradication agents, including latency reversal agents, penetrate, and function in diverse anatomical sites harboring HIV in vivo.
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Affiliation(s)
- Hannah S. Sperber
- Vitalant Research Institute, San Francisco, California, United States of America
- Free University of Berlin, Institute of Biochemistry, Berlin, Germany
- University of California, San Francisco, California, United States of America
| | | | - Kyle A. Raymond
- Vitalant Research Institute, San Francisco, California, United States of America
- University of California, San Francisco, California, United States of America
| | - Mohamed S. Bouzidi
- Vitalant Research Institute, San Francisco, California, United States of America
- University of California, San Francisco, California, United States of America
| | - Renata Gilfanova
- Vitalant Research Institute, San Francisco, California, United States of America
| | - Alan G. Gutierrez
- Vitalant Research Institute, San Francisco, California, United States of America
| | - Marcus O. Muench
- Vitalant Research Institute, San Francisco, California, United States of America
- University of California, San Francisco, California, United States of America
| | - Satish K. Pillai
- Vitalant Research Institute, San Francisco, California, United States of America
- University of California, San Francisco, California, United States of America
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Olson A, Basukala B, Lee S, Gagne M, Wong WW, Henderson AJ. Targeted Chromatinization and Repression of HIV-1 Provirus Transcription with Repurposed CRISPR/Cas9. Viruses 2020; 12:E1154. [PMID: 33053801 PMCID: PMC7600714 DOI: 10.3390/v12101154] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/05/2020] [Accepted: 10/05/2020] [Indexed: 12/12/2022] Open
Abstract
The major barrier to HIV-1 cure is the persistence of latent provirus, which is not eradicated by antiretroviral therapy. The "shock and kill" approach entails stimulating viral production with latency-reversing agents followed by the killing of cells actively producing the virus by immune clearance. However, this approach does not induce all intact proviruses, leaving a residual reservoir. CRISPR/Cas9 has been utilized to excise integrated Human Immunodeficiency Virus (HIV) DNA from infected cells in an RNA-guided, sequence-specific manner. Here, we seek to epigenetically silence the proviral DNA by introducing nuclease-deficient disabled Cas9 (dCas9) coupled with a transcriptional repressor domain derived from Kruppel-associated box (KRAB). We show that specific guide RNAs (gRNAs) and dCas9-KRAB repress HIV-1 transcription and reactivation of latent HIV-1 provirus. This repression is correlated with chromatin changes, including decreased H3 histone acetylation and increased histone H3 lysine 9 trimethylation, histone marks that are associated with transcriptional repression. dCas9-KRAB-mediated inhibition of HIV-1 transcription suggests that CRISPR can be engineered as a tool for block-and-lock strategies.
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Affiliation(s)
- Alex Olson
- Department of Medicine and Microbiology, Boston University School of Medicine, Boston, MA 02118, USA; (A.O.); (M.G.)
| | - Binita Basukala
- Department of Biology, Boston University, Boston, MA 02215, USA;
| | - Seunghee Lee
- Biomedical Engineering and Biological Design Center, Boston University, Boston, MA 02215, USA; (S.L.); (W.W.W.)
| | - Matthew Gagne
- Department of Medicine and Microbiology, Boston University School of Medicine, Boston, MA 02118, USA; (A.O.); (M.G.)
| | - Wilson W. Wong
- Biomedical Engineering and Biological Design Center, Boston University, Boston, MA 02215, USA; (S.L.); (W.W.W.)
| | - Andrew J. Henderson
- Department of Medicine and Microbiology, Boston University School of Medicine, Boston, MA 02118, USA; (A.O.); (M.G.)
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